Acid resisting lining



29, 1942. -RNEUHAUS 2,306,556

ACID RES IsTING LINING Filed Aug. l1, 19414 VE TOR ATTORNEYS I Rchurl Quhaus',

Patented Dec. 29, 1942 Richard.. Neuhaus, Buffalo, N.- Y., assignor to v Nukem Products Corporation, 'Buffalo,fN.-Y. l v Y.

The presentinvention relates to acidresisting .tanks and more particularly to such tanks provided with an improved brick lining. I

Many proposals have been made heretofore of lspecial types of linings for acid resistingtanks,

such as pickling tanks, but all have been ignored in preference to tanks lined with rectangular acid resisting bricks bonded with a thermoplastic or thermosetting cement. When a thermoplastic cement is employed to bond the brick it is poured in hot molten condition into the open joints formed after the brick-work has been looselyassembledby spacing each unit brick from other units.

Normal pickling .operations are carried out with acid'at temperatures between 1GO-190 F. at which temperature the bond is not adversely affected. However, the present tendency in pickling operations is to operate at much higher temperatures, say 220 F. to the boiling point of the pickling solution. At such elevated temperatures there is a tendency for the bond to deteriorate after long continued use whereby the life of the bond is decreased; this applies to thermoplastic as well as thermosetting bonds.

The present invention provides an acid resisting lining designed to withstand high temperature operations and to permit of the increased output obtainable at the higher temperatures.

The present invention is designed further to avoid the disadvantages inherent in the usual brick lining made of a plurality of layers of brick.

The invention also provides a lining of a plurality of layers or tiers of brick in which the layers or tiers are bonded together with acid resisting cement and are also keyed together mechanically.

In the drawing, wherein like numerals designate like parts:

Fig. 1 is a top plan View of a fragment of a wall of the improved form of acid resisting tank; and

Fig. 2 is an elevation of a fragment of the improved lining showing the plurality of layers or tiers.

Referring more particularly to the drawing, a pickling tank with the improved lining of the present invention comprises an enclosing structure I of the desired shape and dimensions which may be made of any suitable material, such as concrete or steel nished with a rubber lining. In the form shown the enclosing structure is of concrete which forms the enclosing and retaining sides and bottom of the tank.

The lining of the tank is built up of an improved form of brick II in the form of a T, well shown in. planY Fig. l. 4.The brick is provided withv a ymajory elongated portion I2 having a tongue I3 located centrally upon'one edge thereof. In observing thebrick in plan the ends Il and I5 are parallel to provide close abutment in assembly. However, the,L edges I6 and I1 of tongue I3 are tapered as shown to provide a mechanical key in assembly of two layers as clearly shown in Fig. l'.y 4

A brick that hanteer; found of suitainejd,nnenT sions is one having' a vheight of 41/2 inches, a

length4 of 9 inchesfand a maximum depth of 5 inches.` .Of this total depthV the tongue portion has a depth of 25/3 inches and tapers from a length of'41/2 inches to 4 inches. Although these specific dimensions have'beenv found eminently satisfactory, it will, of course, be understood that any other suitable dimensions may be employed, the improved feature of the lining residing in the assembly and bonding of the brick in a completely acid-proof wall, as will be more fully disclosed hereinafter.

The improved lining comprises an inner layer IB and an outer layer I9, each of the desired number of courses of brick. Inner layer I8 is formed of individual units of 'brick bonded" to each other and to the enclosing structure I0 in all joints except those formed between vertical edges I4 and I5 which closely abut. Outer layer I9 is bonded to inner layer I8, the individual bricks of layer I9 having no bond along their adjacent vertical edges or horizontal faces.

In laying up the lining wall, the flat edge 2| of the acid resisting brick is placed adjacent to but spaced from the concrete enclosing structure I0 with its major axis parallel .to the wall and with the side edges I4 and I5 in contact. Additional courses of brick of inner layer are built up first by placing such courses on spacers or shims to provide an open horizontal joint. The outer layer is then laid up and keyed to the inner layer as shown. The bricks in layer I9 are not spaced apart horizontally and vertically but are laid adjacent one another, the only joint being the zig-zag joint 22 between layer I8 and layery I9. The acid resisting thermoplastic bond is then poured in molten condition into the open joints and nds its way into the joints and between the individual unit bricks of layer I8, there solidifying to cement the individual units of layer I8 together. At the same. time inner layer I8 is bonded to the enclosing structure I0 and to outer layer I9.

In general there is no coincidence between the horizontal joints of the inner and outer layer due withstanding the absence of cement in the hori- Zontal joints of outer layer I9.

Notwithstanding the fact that the pickling bath may =be operated at tem-peratures above normal, i. e., 1GO-190 F., the bond in the inner layer I8 is protected by lthe facing of brick in the outer layer I9 .through which a considerable tempera' ture drop occurs. The effective life of the lining is therefore not decreased even though the pickling bath be operated at the boiling point to obtain.

greater output.

What is claimed is:

l. An acid resisting tank comprising an enclosl ing structure and a lining of Yacid resisting brick therefor, said lining comprising an inner tier of individual bricks bonded to each other `and to the enclosing structure with acid resisting cement,

and an outer tier of loosely laid bricks abutting -4 each other lbut bonded to the inner tier with acid proof cement. I

2. An acid resisting tank comprising an enclosing structure and a lining of acid resisting brick therefor, said lining comprising an inner tier and an outer tier of individual bricks, said inner tier being bonded inthe horizontal joints, the inner and outer tiers being bonded together with acid resisting cement, the horizontal joints of the inner and outer layers being in different parallel planes whereby the cement between .the two tiers of bricks is protected from the action of acid at relatively high temperatures.

3. An acid resisting tank comprising an enclosing structure and a lining of acid resisting brick therefor, said lining comprising an inner and outer tier, said inner tier being bonded to the outer tier and to the enclosing structure with acid resisting cement, said tiersA being formed of individual units assembled with mechanically cooperating interlocking tongue members whereby the cement `between the two tiers of bricks is protected from the action of acid at relatively high temperatures.

4. An acid resisting tank comprising an enclosing structure and a lining therefor of acid resisting brick, said lining comprising an outer tier of loosely laid individual units abutting each other, and an inner tier of individual units bonded together and to the enclosing structure with acid resistingcement, said tiers being interlo'cked mechanically and being bonded together with acid resisting cement. l 5 An acid resisting tank comprising an enclosing structure and a lining therefor of acid resistingwbrick,` said lining comprising an outer tier of loosely laid individual units abutting each other, and an inner tier of individual units bonded togetherv andto the enclosing structure with acid resisting cement, said tiers being interlocked mechanically and being bonded together with acid resisting cement,Y the horizontal joints of the layers being in different parallel planes.

RICHARD NEUHAUS. 

